Question

I think it was _______ of him not to set aside a part of his earnings for a rainy day.

Answer 1

I think it was improvident of him not to set aside a part of his earning for a rainy day.

Answer 2

Giving that "Improvident" means 'Not showing foresight' I'm more than positive that the correct answer is B.) Improvident because its a common mistake that could require some foresight.
I hope I was any help! Let me know if you need anymore help ^3^
-Demi